Box connection.



W. S. BROWN. BOX CONNECTION.

APPLIOATION FILED HAR. 27, IHT- PATBNTED AUG. 1.1, 1908.

.can be readily connecte L- Wmi..

lWILLIAM S. BROW'N, OF NEW YORK, N. Y.

i .Y A To all whom it may concern.'

Be it known that I, WiLLiAM S; BROWN, a citizen of the United States of America, and a resident ofthe borouvh of Manhattan, city and State of New Yorc, have invented cer. tain new and useful Improvements in Box Connections, of which the followingis a specication.

This invention relates to improvements in box connections for-electric wires, cables, andlproteeting tubes, as well as conduits genera y.

The pur ose of the invention is to provide a device wliich can be readily spun 'orstruck up from sheet metal, re uiring no castings, i and disconnected with and from the box, and which is so constructed-and arranged that a single operation will both fasten the connection firmly to box, aiid clamp it on the insulated wire,

cable or conduit.

Referring to the drawings which accompany the specification to aid the description, igure 1 is a cross section partly in elevation, of a box, connection and insulated cable. Fig. 2 is an elevation of the device on a cable, and showing one means for clai'n ing the outer sleeve on the s lit sleeve an against the box wall .at a sing e operation. Fig. 3` is a side elevation of the two sleeves. Fig. 4 is a longitudinal section of the inner sleeve. Fig. 5 is an elevation of a modification. Fi 6, is a broken longitudinal section throng i the axis of the sleeves. The cable or conduit is omitted for sake of clearness.

Referring to Figs: 1 to 4 inclusive, A being a side-or end of the box and provided vn'th a hole a through which the connection passes, the said connection consists of an inner split sleeve b preferably s un or struck up of sheet metal, and provider with a flange or shoulder c to engage said wall A, d d being the slits in said sleeve b. Said sleeve Z1 is provided with one member of a locking device. and the outer sleeve g is provided with another inember of a locking device, which is preferably constructed as follows: A circumferential groove e is formed in said sleeve b of such shape, that, when a corresponding rejection h on the outer sleeve g is. forced gown into said groove e, the end of said outer clamping sleeve-will nieve hard against'snd clamp the box wall a. between said angd'c and the end of sleeve g, as will be hereinafter more fully explained. Said clamping sleeve g, which is Specification o! LettersPatent. a Y Application and maken 2v, i901. serai Np. 564,823.'

Patented Aug. 1 1, 1908.

open on one side, an'd referably spun or struck up of sheet meta is provided with any suitable device for clamping it on said inner sleeve b, andsuch device may be a screw j passed through holes in lugs lc on said sleeve g and tightened by a nut l.

The parts are assembled and operated as follows, N' 'beimr an armored or insulated `cable. Said s lit sleeve b is passed out through the ho c in the box wall a, and the end of said cable N is passed through the said sleeve b, the shoulder formed on the inside of said sleeve b, reventing the armored wrappingof said ca le from entering the box, and only the insulated wires passing in. Then the clamping sleeve g is slipped on over said sleeve b, until the )iojectionvh registers with said groove e. Tllien the edges of the said. sleeve g are drawn together by the screw and nut Z, and as the clamping sleeve tightens the engagement of said. projection 7i with said groove c causes the end of the sleeve q toniove hard against said box wall a and clamp the same between the said shoulder c and said end m, while at the same time, the clamping sleeve g compresses the inner sleeve b firmlyr upon the cable N. rl`hus by one o eration the connection is clamped to the cab ennd to the boit.

Referring to Fig. 5, the parts arein general similar to corresponding part-s indicated by the same reference letters in Figs. 1 to 4, but .in place of the groove c there is now a V-projection o on said inner sleeve b and a corresponding V-groove p on said clamping sleeve g; and it will be evident, as to both modifications that one or more separate projections might be formed on the innerer :UNITED 'STTL-FENT 4centen.

outer sleeve 4with one oi more correspondinvl recessediparts on the outer member instead of having continuous circumferential grooves or continuons circumferential projections. Sleeve b is referably rounded at s to prevent injury to t ie insulation.

New having described my improvements, I claim as my invention l. A box connection characterized by the following elements,-an imier sleeve adapted to engage one side of the box wall, and having a ineinber of a locking device thereon with a surface inclined inwardly toward said box wall, an outer sleeve ada ted to engage the other side ,of said box wal and to tit on said inner sleeve, and said outer sleeve being provided with another member of said locking device lis-ringe surface adapted to engage l the outside of said box Weil, andsaid outer said rst named surface, Substantially as described. -L i 2. The combination in a box connection, of an inner sleeve adapted to receive a con, duit or cable and to engage one side of a box Wall, and having one member' of a locking device thereon provided with a. surface inclined inwardly toward said box Wall, an

1o outer clamping sleeve adapted to con1pre&`

said inner sleeve o'n said conduit or cable,

t said outer sleeve being rovided with another member of a locking evice adapted to ent nrafre the other side of said box wall, and

. C 1-5 iiavmg a surface ada ted to Contact with said inclined surface, an( means adapted to compress smd outer -sleeve on said inner sleeve,

substantially as described.

3. The combination in a'box connection of 20 an inner coni ressible sleeve for a conduit or .i 25 wall, im outer clam ing sleeve adapted to cmnpress mid inner s eeve on said conduit or cable, and having an end dapted to engage sleeve being rovided with another `rember o a locking evice having a surface. ada ted to contact with said inclined surface o tbe inner sleeve, whereby said sleeves clamp said box Wall and means ada )ted to clamp said outer sleeve on said'inner slleeve,'substantially as described.

4. The combination in a box connection, of an inner cornpressible sleeve b adapted to contact with one side of the box wall, and provided'witii a groove e with an inclined surface, an outer sleeve y adapted to contact with the other side of said box wall, and to clamp on said sleeve b, and a projection h `with inclined surfaces on said outer slome rl sima at New York city this 15er my of 

